there are no differences between those colors except the metal flake or mica that is added to the base black pigment (of course, jet black has no flake added at all). nighthawk black has yellow/orange mica added to it, if i recall correctly, and i'm not familiar with granada.
basically there is very little difference. some people prefer the deep pure luster of jet black, while others like the blacks that change their appearance when viewed at an angle - a black with heavy yellow mica will appear yellowish when viewed from the side, blue mica will make it look bluish, and so on.
the statement "nighthawk black is not good" makes no sense. a color is simply a formula that you mix using a paint system. if somebody is having problems with a nighthawk black paint job, it is the fault of either the paint being of poor quality or the painter not knowing what he is doing.
if you have a good painter, then personal preference lang and ease of maintenance ang decision sa pagpili ng color. personally, i like blacks that have a purplish tinge....Ford and BMW both have colors that look like that (don't know the color names, sorry)
thanks. i searched for threads regarding black cars and personally i preferred jetblack of bimmers. ang ganda.
nighthawk blacks are very common on honda vehicles and i wouldnt want my accord to look very honda ordinary.